Routing from DMZ to LAN

Hi there
I try to make connection between DMZ server, with public address, and LAN computers.
When I ping public adress 80.80.80.110 FROM local area computer, all works fine.
But if I try ping from DMZ servers (80.80.80.110) to local TO local area network computer "Request time out".
What's wrong? All networks are direct connected to router?
Scheme is attached
Routing table look like this:

DST-ADDRESS PREF-SRC GATEWAY-STATE GATEWAY DISTANCE INTERFACE

0 A S ;;; added by setup
0.0.0.0/0 reachable 80.80.80.105 1 external
1 ADC 192.168.1.0/24 192.168.1.1 0 local
2 ADC 80.80.80.104/30 80.80.80.106 0 external
3 ADC 80.80.80.108/30 80.80.80.109 0 dmz


Note: LAN computers not firewolling